Flour-sifter



NA PETERS. PHOfO-LITHGRAPHEH. WASHINGTON. D C.

UNITED STATES PATENT OFFICE.

ZIBA SAUNDERS, OF TEWKESBURY, AND ABIEL F. SAUNDERS, OF BOSTON,

MASSACHUSETTS.

FLOUR-SIFTER.

Specification forming part of Letters Patent No. 50,8117, dated November 7, 1865.

To all whom it may concern:

Be it known that we, Zinn SAUNDERs, of Tewkesbury, in the county of Middlesex and State of Massachusetts, and ABIEL F. SAUN- DERs, of Boston, in the county of Su'olk and State aforesaid, have invented a new and Improved Flour-Sifter, ot' which the following is a full, clear, and exact description, reference being had tothe accompanying drawings, mal;- ing part of this specification, in which-` Figure l is a perspective view ot my improved sitter. Fig. 2is a vertical transverse section through the center ot' the same. Fig. 3 is a longitudinal vertical section through the center of the same.

That class of iiour-sifters now in general use where the tlour is rubbed over a sieve by means of a revolving shalt provided with flanges, projections, orsimilar devices are objectionable, as any impurities which may be in the tlonr are liable to be mashed or ground up and carried through the sieve, while the shaft is frequently prevented from revolving, and the sieveitseltl is broken by nails and other hard substances; and there is also a liability ofthe our adhering to the ianges or projections and gradually iilling up and clogging the space between them and their shaft.

The object ot'our invention is to remove the above-mentioned difficulties; and it consists in a shaft provided with a series of longitudinal rods or beaters revolvingin elastic oryielding bearings attached to the sides of the box or hopper.

To enable others skilled in theart to understand and use our invent-ion, we will proceed to describe the manner in which we have carried it out. Y

In the said drawings, Ais a box or hopper, which is supported on legs a, and has attached to its lower end a sieve, B, ot a curved form, as seen in Fig. 2.

C is a shaft, the extremities of the axis of which pass through open slots in the side ot' the box A, and have their bearings in plates b, attached to the outside by means of rubber or other elastic strips, c. One end ofthe axis of the shaft projects beyond its bearings in the plates b, and is bent to form aerankor handle, d, by which the shat't is revolved. At opposite ends of the shaft C, within the box A, are formed the circular projections e, into which are secured the bent ends 4 of a series ot rods or beaters, D, the longitudinal portion 5 ot' each forming about a right angle withits bent end 4, and rubbing in contact with the sieve B as the shaft C is revolved. The rods or beaters D beinground and of a small diameter, and the tlour being agitated and constantly rubbed by Athem over the bottom of the sieve B, there is no possibility of the ourclogging the space between them and the shaft C, the lumps passing` or being rolled over the beaters as they revolve.

In the event of any obstruction being forced under one ot' the bea-ters and wedged between it and the sieve B, the axis ot' theshatt is pressed upward in its yielding bearings, and may continue to revolve without injury to the sieve.

A flour-sitter constructed as above described performs its work in a rapid and effectual manner, and may be furnished at a smalleost.

What we claim as our invention, and desirev to secure by Letters Patent, as an improvement in flour-sitters, is-

The revolving shaft G, carrying a series of rods or beaters, D, in combination with a yielding bearing, b, constructed and operating substantially as described.

ZIBA SAUNDERS. ABIEL F. SAUNDERS.

Witnesses:

P. E. TEscHEMAcHER, N. W. STEARNs. 

